I noticed that you are trying to make the mod as realistic as possible, so I just have a 3 suggestions.
Cars exploding
This goes for helicopter/aircrafts too.
Have you ever been driving over hills, and suddenly your car explodes because a little rough road? I think you guys should make it so you car/aircraft stops working before it explodes.
EG: when you jump off a hill in your car, it hits the ground, and looses the ability to drive, instead of exploding. And after a little bit more damage, then it explodes.
Or your APC is hit by an RPG, and it stops working. Rather than exploding/drives away
Weapon Damage, to people and vehicles
I noticed that there is not much of a difference between the damage of the M16/SA80, and the 7.62 families.
I have gone into rooms and unloaded into a soldier with my AK-47, and they just pop off a few shots with the SA80, and it killed me instantly, I am aware that M16/SA80 have a higher rate of fire, but the 7.62 round is nearly double the size of the 5.56. it should probably be one shot to the chest should kill them, and anywhere else should cause bleeding, and provide a 2-3 shot kill. Also the SVD should probably be suped up, I noticed that it takes 2 shots generally to kill targets, but in a Juba video for instance, the soldier will be dropped with one shot (whether he be dead or badly injured)
Also, small arms don't have much of an ability to damage vehicles. I will see my teammates shooting at helicopters courageously flying 20 meters above our head, and them still leaving without a scratch, even though they should have been scrap metal at that point.
A bit more weapon variety
I Think there should be a bit more flexibility when it comes to soldier classes, and the weapons they can choose.
Having to find different guns by ammo caches is a bit weird, because I think soldiers are generally assigned to a weapon/class, and insurgents generally leave their weapons (that they chose in the first place) in their houses.
Maybe you could add another class, and for some classes give them the ability to choose a different weapon from bf2's unlock button. For instance, a war veteran could have the ability to choose between an AK47 and a G3A3 (which is used extensively by insurgents) and the insurgent class, could choose between the RPK-47 (maybe the PKM) and the AK-47.
An anti tank class would also be nice, for the insurgent class it could be called RPG gunner, and they could have 2-3 OG7v rounds (fragmentation), 1-2 PG7v rounds (anti tank) and an AK74u/Bizon-9mm. And maybe the Brits/Americans could get a one shot disposable L2A1/M136 with an SA80/M16.
I know this is a kind of explode in your face kind of thread, but it would be nice if some of these could be taken into consideration. I can still feel some of that old crusty bf2 qualities still in Project Reality.

Jaymz
RANGERS LEAD THE WAY!!!
Do not post stupid suggestions just because you had a bad round in PR 